I used an older 2500 Surburban with a 454 to tow an older 31 ft. Airstream. It did a great job in the flat land and in the mountains out west. The mileage wasn't anything to brag about, but it did a great job WITHOUT a Hensley. The newer Surburban with the 8.1 should do a great job with any Airstream. Sam WBCCI 12557